Prevalence and distribution of prostatic intraepithelial neoplasia in salvage radical prostatectomy specimens after radiation therapy

Liang Cheng, John C. Cheville, Thomas M. Pisansky, Thomas J. Sebo, Jeff Slezak, Erik J. Bergstralh, Roxann M. Neumann, Rohini Singh, Anna Pacelli, Horst Zincke, David G. Bostwick

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29 Scopus citations

Abstract

High-grade prostatic intraepithelial neoplasia (PIN) is the most likely precursor of prostate cancer. The effect of radiation therapy (RT) on the prevalence of PIN is uncertain. We studied 86 patients who underwent salvage radical prostatectomy after irradiation failure at the Mayo Clinic. The prevalence, volume, multicentricity, spatial proximity to cancer, and architectural patterns of PIN were evaluated. High-grade PIN was identified in 53 (62%) of 86 prostatectomy specimens. Multiple architectural patterns were usually observed, including tufting in 87%, micropapillary in 66%, cribriform in 38%, and flat in 17%. The mean volume of PIN was 0.12 cm3 (range, 0.05-1.20 cm3). PIN was usually multicentric (70%), with a mean number of PIN loci of 2.5 (range, 1-10). Ninety-four percent of PIN loci were located within 2 mm of invasive cancer. There was no correlation between PIN and pathologic stage, surgical margin, tumor size, DNA ploidy, post-RT Gleason score, time interval from RT to biopsy-proven recurrence, postoperative prostate-specific antigen level, distant metastasis-free survival, or cancer-specific survival. Our examination of salvage radical prostatectomy specimens indicated that the prevalence and extent of PIN appeared to be reduced after RT compared to published studies of prostatectomies without prior RT.

Original languageEnglish (US)
Pages (from-to)803-808
Number of pages6
JournalAmerican Journal of Surgical Pathology
Volume23
Issue number7
DOIs
StatePublished - Jul 1 1999

Keywords

  • Irradiation
  • Prostatic intraepithelial neoplasia
  • Prostatic neoplasms
  • Radiotherapy

ASJC Scopus subject areas

  • Anatomy
  • Pathology and Forensic Medicine

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    Cheng, L., Cheville, J. C., Pisansky, T. M., Sebo, T. J., Slezak, J., Bergstralh, E. J., Neumann, R. M., Singh, R., Pacelli, A., Zincke, H., & Bostwick, D. G. (1999). Prevalence and distribution of prostatic intraepithelial neoplasia in salvage radical prostatectomy specimens after radiation therapy. American Journal of Surgical Pathology, 23(7), 803-808. https://doi.org/10.1097/00000478-199907000-00008